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Conditionally remove indices that may not exist in pre-GitLab v6.7 installations

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Closes #1593
This commit is contained in:
Stan Hu 2015-05-08 00:27:47 -07:00
parent c4aa700398
commit f6c0ef5553
1 changed files with 9 additions and 2 deletions
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11
db/migrate/20150425164648_add_missing_unique_indices.acts_as_taggable_on_engine.rb
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@ -3,8 +3,15 @@ class AddMissingUniqueIndices < ActiveRecord::Migration
def self.up
add_index :tags, :name, unique: true
remove_index :taggings, :tag_id
remove_index :taggings, [:taggable_id, :taggable_type, :context]
# pre-GitLab v6.7.0 may not have these indices since there were no
# migrations for them
if index_exists?(:taggings, :tag_id)
remove_index :taggings, :tag_id
end
if index_exists?(:taggings, [:taggable_id, :taggable_type, :context])
remove_index :taggings, [:taggable_id, :taggable_type, :context]
end
add_index :taggings,
[:tag_id, :taggable_id, :taggable_type, :context, :tagger_id, :tagger_type],
unique: true, name: 'taggings_idx'